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lglgtaitrt tates atrut @fitta PHOTOGRAPHIG COPYING-BOARD.

aT-lgs Segnale maar mit tipa tcttcts ateit mit making putt nf tigesaure.

' lO ALL WHOM IT MAY CON CERN Be it known that I, W. D. BLACKMAX, ofDefiance, Detiance county, Ohio, have invented a new and improvedPhotographic Copying-Board; and I do hereby declare that the followingis a full, clear, and exact description thereof, which will enableothers skilled in the art to make and use the same, reference being hadto the accompanying drawings forming part of this specification, inwhich- Figure 1 represents a side elevation, partly in section, of myimproved photographic,platcholder, the plane of section being indicatedby the line e e, fig. 2.

Figure 2 is a front elevation, partly in section, of the same.

AFigure 3 is a detail vertical sectional view of the same, the plane ofsection being indicated by the line :v zr, iig. 2.

Figure 4 is a horizontal sectional view of the same, the plane ofsection being indicated by the line yy, g. 2.

Figure 5 is an inside view of one of the jaws for holding the picture.

Similar letters of reference indicate corresponding parts. i

The object of this invention is to facilitate the copying of oldpictures, such as photographs, ambrotypes, daguerreotypes, and others,by photographic process.

The invention consists in constructing and arranging an apparatus inwhich the afresaid old pictures can be held; said apparatus being soconstructed that pictures of different sizes can be firmly held therein,and so that the pictures in it can be moved to-or from the camera toadjust the focus, and raised or lower to be centred.

A represents a horizontal board or platform, upon the front end of whichthe camera stands. In its rear end b is arranged a slot, in which ablock, B, slides, said block being provided with anges c c, whichoverlap the edges of the slot, as shown in iig. 2. In the block B isarranged an upright sliding-post, C, which is pro vided with aratchet-bar, d, on one side, into which a pinion, e, meshes. This pinionis mounted on a shaft, D, which extends through the whole length of thatportion of the board A that is in front of the slats; the front endofthe said shaft being provided with a crank or hand-wheel, f. Byturning the said shaft D the post c can be raised or lowered-at will inthe block B. Another shaft E passes from the front part of the plate Ainto and through the block B, being provided with a screw-thread at itsrear end, and passing through a nut, g, that is arranged in the saidblock, as is clearly shown in fig. 3. Thus by turning the shaft E theblock B and its appendages can be brought nearer to or further from thecamera. The pinion e must slide on the shaft D so that it can be carriedalong with the block B, that portion of the shaft D being squared forthe purpose. To the upper end of the sliding upright post C is pivoted adisk, F, which has two ears t L, through which the pivoting pinz'passes, as is clearly shown in iig. 2. In this disk are two slots,which are arranged on either side ofthe centre on the horizontaldiameter, and as indicated in fig. 4; the said slot reaching almost fromthe centre to the rim, as shown. Through each one ofthe slots in thedisk F passes a pin, '7', which is squared in the slot, as shown in iig.4. From the centre ofthe disk F projects towards the rear a fixedhorizontal pin, k, upon which a revolving disk, Gr, is hung, in whicheccentric slots are arranged, as is clearly shown in g. 2. The pinsjpassthrough these eccentric curvilinear slots, and are provided with headson their front and rear ends. The front end of each pin passes throughan almost seinicircular plate H, g. 5, the cord or straight line of eachplate H being vertical,l as is indicated by dotted lines in fig. 2. Byrevolving the disk G around the pinA R, the pins j are moved in theeccentric slots further from or nearer to the centre of the disk, and dothereby bring the plates H more or less'apart so as to adapt theapparatus for holding larger or smaller pictures. On theinner side oi'each plate H is arranged a spring, Z, which carries astraight verticalrod, m, near to and parallel with the straight edge of the said plate H,as shown in iig. 5. These rods m serve as rests or frames for thepicture, and are, by turning the disk G, brought close to the edge ofthe picture. I is a knob, having a tubular extension, n, which fits thecentre of the disk G, and surrounds the central spindle R of the disk F.On the front end of the tube n are teeth makingit appear like a clutch,and corresponding teeth are formed on the inside of the disk F, as shownin iig. 4. By turning the knob I the plate G can be drawn away from thedisk F, and the plates H will thereby be clamped against the disk F,which will be understood from fig. 4; the knob I being turned so thatthe projecting parts of yn' are over thehigher parts of the clutch 0n Ftl Thereby the picture will be firmly clamped between the plates II andthe disk F.

` coges By means of the shaft D the picture can be raised and loweredand centred; and by the shaft E it can be mo ed nearer to or furtherfrom the camera, and its focus regulated.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

l. A photographic copying-board, made and operating substantially as andfor the purposes herein specified and described.

2. The device for ceutring the picture that is helden the plate F, saiddevice consisting of the ratchetbar d C, pinion e, and shaft D, all madeand operating substantially as herein specifi-ed and described.

3. The device for adjusting the focus of the picture that is held on theplate F, said device consisting of the sliding-block B, nut g, andscrew-shaft E, all made and operating substantially as and-ior thepurpose herein specified and described. A

4. The device for increasing the size of the' frame for holding thepicture to be photographed, said device consisting of the stationarydisk F, revolving disk G, pins jj, plates H, and spring-bars m, all madeand operating substantially. as and for the purpose herein specifiedanddescribed.

5. The device for. clampingthe picture, consisting of the revolvingclutch I, iu combination with the stationary clutch F, disk G, pins j,and plates H, al1 made and operating substantially as described.

The above specification of my invention signed. by me this 27th day ofMarch, 1867.

' W. D. BLACKMAN. Witnesses:

EDWARD H. GLnAsoN, Hanni HARDY.

